Telephone switch



Jul'y zo, 192e.

1,593,401b C. L. GOODRUM TELEPHONE SWITCH Filed July 31, 1923 Patented July 20, 1926.

. UNITED STATES g 51,593,401 PATENT OFFICE.

CHARLES L. GOODRUM, OE NEW YORK, N. Y., AssIGNoR To WESTERN ELECTRIC COM- PANY, INCORPORATED, OE NEW YORK, N. Y., A CORPORATION OE NEW YORK.l

. c TELEPHONE sWirCH.

Application liled July 31,

This invention relates to` telephone switches. More particularly it relates to that type of Coordinate switch adapted for establishing connections in an automatic or semi-automatic telephone exchange system.

The object of this invention is to provide a switching device of the character above referred to in which sets of disengaged contacts are moved selectively into contacting engagement in a simple and positive manner and wherein the operating parts are readily accessible for adjustment or repairs.

A feature of the invention resides in the provision of an improved mechanism whereby sets of primary contacts are moved into contacting relation with associated contacting lugs through the release of a longitudinally movable bar therefor.

Another feature is the provision of longitudinally movable bars for moving contacting lugs and camming members carried thereby in position wherein pins carried by another bar operatively engage with insulating cards for moving sets of primary contacts in engageable relation with associated contacting lugs.

Another feature relates to the manner in,` which the sets of contacts are selectively operateol.4 Brieflypthe operation consists in first, moving theselecting bar together with the contacting lugs and the cams carried thereby in operable relation with associated operating pins carried by the operating bars; second by moving the operating bar in position whereinthe pins carried thereby are diverted from their normal path in engageable relation with the primary contacts operating cards; third by imparting another movement to the selecting-bar yfor moving the contacting lugs in engageable relation with their associated primary contacts; and fourth by replacing the operating barand the active contacts served thereby for engaging their associated contacting lugs.A

Other features and advantages will appear from the following description and from `the claims appended thereto, reference being had to the accompanying drawings, in which Fig. 1 is a partial front 'assembly view of said switch. Figs2 is a left hand side view thereof. Fig. 3 is a perspective view of a modified form of a bank of secondary contacts.

Similar reference characters refer to similar parts throughout the different views.

tacts 21, 22, 23, etc., there is provide 1923. serial No. 654,821. M

The switch structure shownv in 'Fig.`1 generally consists of a plurality of coordinately disposed rows of `primary and secondary contact sets, the primary contact sets being arranged in a horizontal plane and projecting through parallely disposed upright supports 20 shown in Figs.- 1 and 2. Each set of primary contacts generally consists of a plurality of bare wires 21, 22/and 23, the free ends of which extend through their respective apertures 15, 16 and 17 in an operating card 2.4. The cards 24 are slidably arranged into suitable channel-shaped guiding members 25 each associated with an Vupright support 20 and'securely ,fastened on portions of the switch frame (not shown). The switch structure may comprise any number of upright supports 20 and as many setsper row according to the switch capacity desired.

`lElor each horizontal row of primar cona sequentially movable bar 26 on which the conducting strips 27, 28 and 29 are nsulatedly arranged. Each strip 27, 28 and 29 carries a plurality ofsets of hook-shaped 'contacting lugs 30, 31, 32, etc.,\which extend therefrom in juxtaposition with their respectively associated primary contacts 21,22 and 23. On each bar 26 there is provided a plurality of camming members 33 each associated with a pin 34 projecting from one side of a resilient member 35 in operable relation with a cam 83 and projecting from the other side of member 35`in operable relation with a hook-shaped portion 19 of operating card 24.

For each-vertical row of active'contacts 21, 22 and 23, there is provided a vertically disposed operating bar 36- provided in its lower end portion with a pin 37 disposed in operable relation withr an armature 38 adaptedto move the bar 36` and the resilient members 35' carried thereby fin response to eachV energization of anele'ctr'omagnet 39. It is to be noted that normally the pins 34 kare free to move along side vof the catches 19 Without engaging them. On one end portion of each horizontal bar 26 there is provided a pi-n 4() disposed in operable relation with a pair of armatures 41 and 42 hinged on a common axis and adapted to move the bar 26 in a two-stage movement in response to the successive energization of electromagnets 43 and 44. Armature 42 is lll operatively associated with electromagnet 43 and loosely connected to armature 4l adapted to move the bar 26 and the cams carried thereby in operative relation with the pins 34 in response to the energization of magnet 43.

Upon a movement oi a bar 36 following a preliminary movement et a bar 2G, the actuating pin 34 engages its associated cams 33 and is moved thereby in operative relation with the catch portion 19 of its associated ope fat-ing card 24 whereby the primary contacts served thereby are moved in engageable relation with their associated contacting lugs 30, 31 and-3Q` as illustrated by the middle set oi contacts ot the right hand row in Fig. 1. The subseipient longitudinal movement ot bar 2G imparted by the armature 4l through the energization ot electromagnet 44 results in .moving the. con tacting hooks 30, 3l and 32 to a point wherein the releasel Aino-vement oi the vertical bar 36 is effective to engage the primary contacts l5, '1G and 17 with their associated contacting lugs 30, 3l and 32 respectively. lt is to be notedI that when the bar 36 is restored` to normal position the resilient member is retracted to normal position through the medium oit its own tension and the bar 3G may be operated to participate in the establishment of other co-existing connect-ions without disturbing the connection already established. lVhen magnet 44 deenergizes the bar 26 is returned to normal position by means of spring 46 which has one end resting against the bar supporting member 47 and the other end against the pin 40. The movement oil" bar QG -from operated. to normal position is etective to disengage the secondary contacts 30, 31 and 32 trom their respectively associated primary contacts 21, 22 and 23 which return` to normal position through the medium of their own tension and to effect therebetweena wiping action due to the tension o'lI the primary contacts.

Fig. 3 shows a niodihed form o't a bank oit secondary contact sets which generally consists of a plurality ot bare wires 47, 48 and 49I arranged between insulating strips 50 and 5l which may be fastened on. the bar QG in any suitable manner. The contacting lugs 52, 53 and 54 of conducting wires 47, 48 and. 49 are arranged in their respective notches 55, 56 and 57 disposed along one edge ot the insulating strip 5l in staggered relation and protruding therefrom in parallel alignment with reference to the upper surface of the insulating bars 50 and 5l.

lVhat is claimed is:

l. In a switching device, sets of disengaged movable contacts arranged in ooordinate rows, a selecting mechanism therefor comprising coordinately 'disposed longitudinally movable bars, means cooperating with one-'of said bars for moving one of said contact sets into a predetermined position, a plurality ot means operable in sequence and cooperating with another ott said bars for positioning another of said contact sets in an engageable relation with said positioned set, and means tor releasing the said iirst means to elect an interengagement ot said positioned sets.

2. In a coordinate switch structure, rows oi sets ot normally disengaged contacts, a longitudinally movable ba-r .tor each ot' sai'd. rows, cams carried by said bars, an operat ing card 'for each oil. the said sets, a catch member carried. by each oit said cards, and means cooperating with said cams for operatively engaging said catches for inter-engagingl said contacts.

3. ln,y a izoor flinate switch structure, a stationary support, sets ot primary contacts an ranged' on said stationary support, a sequentially movable bar, sets ol: secondary contac-ls arranged on said. sequentially movable bar, a pair oit electromagnets Vtor moving the bar in a, plurality olf selettive movements with respect to said prinlary contacts, and means Ior moving said primary contacts to a. position wherein they are effective to engage their associated secondary contacts.

ln a coordinate switch structure, sets o t' .rinia|y contacts, a longitudinally movable har, sets ot' conductor members arranged on said longitudinally movable bar, sets of hook-shaped contacts laterally extending 'trom said bars and adapted to be moved in contacting relation with said primary contacts, an operating card ttor each set ot primary contacts, hook-shaped portions integrally lormed with said cards, cams carried by said bar one tor each of said cards, an operating bar common to a plurality of sets ot primary contacts, and means carried by said operating bar for operatively engaging said cards to move the primary contacts served thereby wherein they are etlective to engage said second mentioned contacts.

5. In a coordinate switch structure, sets primary contacts arranged in rows, ins lating supports therefor, conductor members having sets of contacting hooks associated with said contacts, a longitudinally movable bar tor moving said members, cams carried by said bar, a two-stage mechanism l'or moving said bar lirst one step tor positioning said hoolis and said cams with reference to said primary contacts, an operating bar disposed coordinately to the first mentioned bar, neans carried by the last mentioned bar for operatively engaging said card tln'ough the medium of said cam, and means for movingthe iirst mentioned bar another step to a position wherein the release oit said means is eliective to interenge said contacts with said hooks.

6. In a switching device, sets ot primary l (if) contacts, sets of secondary contacts associated therewith and arranged insulatedly on a longitudinally movable bar, cams carried by said bar one for each set of said primary contacts, another longitudinally inovablebar disposed coordinately to the first mentioned bar, resilient members carried by the last mentioned bar one for each set of said primary contacts, means for operating the first mentioned bar to move said cams in operative relation with said resilient members, means for operating the second mentioned bar for moving said primary contacts in the path ot their associated secondary contacts, and means for moving the secondary contacts wherein the release of the second mentioned bar is eilective to interengage said primary and secondary contacts.

7. In a switching device, sets of primary contacts arranged in rows, a longitudinally movable bar associated with each rowy of said contacts, other bars disposed coordinately to the first mentioned bars, hook-shaped contacts carried by the last mentioned bars, means for moving each of said last mentioned bars in a plurality ot sequential movements for causing the inter-engagement of said first and second mentioned contacts, and means for effecting a wiping action between said primary contacts and the hookshaped contacts when one of the last men tioned bars releases.

8. `In a coordinate switch structure, sets of primary contacts, other contacts associated therewith, a longitudinally movable bar Jfor moving the second mentioned contacts toward said primary contacts in a first selective movement of said bar, cams carried by said bar, and means cooperating withsaid cams for moving the first mentioned contacts in position wherein another movement of said bar is effective to cause the interva *'urther movement to said particular set ot secondary contacts, and means for re-l leasing the primary set of contacts into operative engagement with such secondary contacts.

In witness whereof, I hereunto subscribe my name this 2l day of July A. D., 1923.

CHARLES L. GOODRUM. 

